. >> reporter: technology and data gathering allow the tsa to deem some people low risk and of those a percentage will be chosen for the special security line currently being used by prescreened travelers. >> it doesn't diminish screening. it gives us the chance to focus greater on the people we don't know a lot about. >> reporter: and at oakland international airport that may be good news during the holiday travel season. >> it speeds things up for travelers and allows tsa to focus its limited resources on the areas most needed. >> it was very different. it was great. >> reporter: how many travelers will get selected for the precheck line? that, too, is random but tsa officials say they may operate a second precheck line based on the volume of travelers this holiday season n. oakland, ann reuben, ktvu channel 2 news. >>> more details now in the tsa's precheck program. once enrolled travelers do not have to remove their belts, shoes or jackets at the security checkpoint. also they do not have to remove their laptop from its case or pull out the bag of approved liquids. >>> state regu